The opening race at Caulfield on Saturday was won in good style by lightly raced Sepoy filly Watchmespin, a $150,000 Magic Millions purchase from the Mill Park draft with Group I aspirations.

The Danny O’Brien trained filly broke her maiden at Seymour at her second start and had no trouble bringing that good form into tougher Saturday company to score a good win.

A drifter in the betting she settled back in the seven horse field and surged home to win the 1400 metre contest by three-quarters of a length.

“She’s a beautiful style of filly and we’ve always had a really big opinion of her,” O’Brien said.

“We were just waiting until she turned three and we’re really looking forward to getting her out over probably a mile and further.”

Watchmespin will be entered in all the big fillies Black type races over the spring.

“On all of the stuff we see at home she’ll step out to 2000 metres and possibly a mile and a half when she gets a bit more seasoned,” O’Brien said.

Raised at Mill Park, Watchmespin is a half-sister to Group III placed Dream First and is the third winner from three foals to race from Tobouggie Woogie, a half-sister to Group II winner Majestic Music from the family of Group I MRC Thousand Guineas winner Serious Speed.

She is the last foal of Tobouggie Woogie, who died in 2014.

Later in the program Written Tycoon filly Booker lost no admirers with her brave second to star colt Merchant Navy in the Group III MRC HDF McNeil Stakes at her first run of the spring.

Prepared by Matt Ellerton and Simon Zahra, Booker won on debut in May and was second in the Group III SAJC National Stakes before spelling.

She looked all over a winner in the McNeil before being caught late by the colt, so appears to have returned in exceptional order.

A $230,000 Inglis Premier purchase from the Mill Park draft, Booker is the first winner for Noondie, a three-quarter sister by Flying Spur to stakes-winner Tranquility from stakes-winner Creatrix.

Noondie has a yearling colt by Written Tycoon and has already foaled this spring producing a colt by Starspangledbanner.